package pl.pkolodziej.utils;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CharsetFilter implements Filter {

		/**
	    * This filter provides a solution for mis-encoded UTF-8 chars in Apache Tomcat.
	    * @see http://wiki.apache.org/tomcat/Tomcat/UTF-8
	    */
	
	private String encoding;

	public void init(FilterConfig config) throws ServletException {
		encoding = config.getInitParameter("requestEncoding");
		if (encoding == null) { encoding = "UTF-8"; }
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain next) throws IOException, ServletException {
	// Respect the client-specified character encoding
	// (see HTTP specification section 3.4.1)
		if (null == request.getCharacterEncoding()) { request.setCharacterEncoding(encoding); }
		next.doFilter(request, response);
	}

	public void destroy() {
	}

}
